Home / 858,913.40-1,288,370.10-439,009.40

Finding the Fourth Proportional to 858,913.40, 1,288,370.10 and 439,009.40

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Solution

The fourth proportional to 858,913.40, 1,288,370.10 and 439,009.40 is: 658,514.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,913.40 : 1,288,370.10 = 439,009.40 : x
  2. Step 2: Convert to fraction form
    858,913.40/1,288,370.10 = 439,009.40/x
  3. Step 3: Cross multiply
    858,913.40x = 1,288,370.10 × 439,009.40
  4. Step 4: Simplify right side
    858,913.40x = 565,606,584,578.94
  5. Step 5: Solve for x
    x = 565,606,584,578.94/858,913.40
  6. Step 6: Final answer
    x = 658,514.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.